Change in the microstructure and mechanical properties of drawn pearlitic steel with low-temperature aging

D. Hirakami, K. Ushioda, T. Manabe, K. Noguchi, K. Takai, Y. Hata, S. Hata, H. Nakashima

研究成果: Contribution to journalConference article

1 引用 (Scopus)

抜粋

Hydrogen embrittlement is a serious problem in high-strength steels. Drawn pearlitic steel shows excellent resistance to hydrogen embrittlement despite its high strength, and aging treatment at a low temperature can simultaneously improve its strength and hydrogen-embrittlement resistance. To clarify the mechanism for this we have used thermal desorption analysis (TDA) and the newly developed precession electron diffraction analysis method in the transmission electron microscope. After aging at 100 °C for 10 min, the amount of hydrogen seen amount on the TDA curve reduced at around 100 °C. In contrast, when aging was performed at 300 °C, the hydrogen amount further reduced at around 100 °C and the unevenly deformed lamellar ferrite zone was locally recovered. For the samples that were aged at the low temperature, we confirmed that their yield strength and relaxation stress ratios increased simultaneously with improvement in the hydrogen-embrittlement property. We infer that segregation of carbon or formation of very fine carbide in dislocations during aging is the cause of these behaviors.

元の言語英語
記事番号012026
ジャーナルIOP Conference Series: Materials Science and Engineering
219
発行部数1
DOI
出版物ステータス出版済み - 8 1 2017
イベント38th Riso International Symposium on Materials Science - Riso, デンマーク
継続期間: 9 4 20179 8 2017

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

フィンガープリント Change in the microstructure and mechanical properties of drawn pearlitic steel with low-temperature aging' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用